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<head><meta charset="utf-8"><title>Type-check type aliases · edition 2021 · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/268952-edition-2021/index.html">edition 2021</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/268952-edition-2021/topic/Type-check.20type.20aliases.html">Type-check type aliases</a></h3>

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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/268952-edition%202021/topic/Type-check%20type%20aliases/near/228011865" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Waffle Lapkin <a href="https://rust-lang.github.io/zulip_archive/stream/268952-edition-2021/topic/Type-check.20type.20aliases.html#228011865">(Feb 26 2021 at 23:22)</a>:</h4>
<p>There is a very old issue with type aliases not being type-checked (see <a href="https://github.com/rust-lang/rust/issues/21903">issue #21903</a>). Is it possible to fix this in edition 2021?</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/268952-edition%202021/topic/Type-check%20type%20aliases/near/228045426" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Jakub Duchniewicz <a href="https://rust-lang.github.io/zulip_archive/stream/268952-edition-2021/topic/Type-check.20type.20aliases.html#228045426">(Feb 27 2021 at 09:09)</a>:</h4>
<p>May this be by any chance related to rust-analyzer having troubles with type aliases? <a href="https://github.com/fannheyward/coc-rust-analyzer/issues/636">issue</a></p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/268952-edition%202021/topic/Type-check%20type%20aliases/near/228045473" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Jakub Duchniewicz <a href="https://rust-lang.github.io/zulip_archive/stream/268952-edition-2021/topic/Type-check.20type.20aliases.html#228045473">(Feb 27 2021 at 09:10)</a>:</h4>
<p>I doubt it though</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/268952-edition%202021/topic/Type-check%20type%20aliases/near/228045784" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/268952-edition-2021/topic/Type-check.20type.20aliases.html#228045784">(Feb 27 2021 at 09:17)</a>:</h4>
<p>Ah, this is a tricky one, in part because the resolution is not clear.</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/268952-edition%202021/topic/Type-check%20type%20aliases/near/228045786" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/268952-edition-2021/topic/Type-check.20type.20aliases.html#228045786">(Feb 27 2021 at 09:17)</a>:</h4>
<p>I'd be inclined to hold off and tackle this one next edition</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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